NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY AND METHOD FOR MANUFACTURING THE SAME
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United States of America Patent
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Jul 14, 2016
app pub date -
May 21, 2014
filing date -
Sep 5, 2013
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Abstract
A non-aqueous electrolyte secondary battery includes: a positive electrode; a negative electrode that includes an active material containing a titanium oxide having a lithium ion storage potential of 1.2 V or higher (versus Li/Li+); a non-aqueous electrolyte containing a lithium salt including lithium hexafluorophosphate and lithium tetrafluoroborate; and a non-aqueous solvent including ethylene carbonate, cyclic carboxylic acid ester, or cyclic carbonate having four or more carbon atoms, and chain carbonate. The content of ethylene carbonate in the entire non-aqueous solvent is 5 to 20 vol %, and the concentration of lithium tetrafluoroborate in a non-aqueous electrolyte solution is 0.05 to 0.5 mol/l.
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